A new adventure awaits Sinterklaas and his friends in the Caribbean.

In the underground world, there are not only terracotta warriors and horses, but also a variety of bronze relics, resurrected bronze beasts and an underground creature called the "Earth Horn". The hero, Meng Yuan, is an odd-job figurine in the underground Qin tombs. He works with the mysterious girl Shi Yu to capture the Earth Horn and goes through dangerous situations, but unexpectedly discovers the mystery of the endless battle between the Earth Horn and the terracotta warriors